期刊
NANOSCALE
卷 6, 期 20, 页码 11738-11743出版社
ROYAL SOC CHEMISTRY
DOI: 10.1039/c4nr03600j
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资金
- NTU seed funding for Solar Fuels Laboratory
- MOE AcRF-Tier 1 [RG 44/11]
- MOE AcRF-Tier 2 [MOE2012-T2-2-041, ARC 5/13]
- CRP from NRF Singapore [NRF-CRP5-2009-04]
- MOE in Singapore [ARC 26/13, MOE2013-T2-1-034, RG 61/12]
- Singapore National Research Foundation
We report the generation of triangular Ag-Pd alloy nanoprisms through a rationally designed synthetic strategy based on silver nanoprisms as sacrificial templates. The galvanic replacement between Ag nanoprisms and H2PdCl4 along with co-reduction of Ag+/Pd2+ is responsible for the formation of final prismatic Ag-Pd alloy nanostructures. Significantly, these Ag-Pd alloy nanoprisms exhibited superior electrocatalytic activity for the oxygen reduction reaction (ORR) as compared with the commercial Pd/C catalyst. Such a high catalytic activity is attributed to not only the alloyed Ag-Pd composition but also the dominant {111} facets of the triangular Ag-Pd nanoprisms. This work demonstrates the rational design of bimetallic alloy nanostructures with control of selective crystal facets that are critical to achieve high catalytic activity for fuel cell systems.
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